Set of Chemistry CEE-5
Posted by Set of Chemistry CEE-5
1. What is the atomic number of chlorine?
a) 12
b) 17
c) 19
d) 15
2. Which of the following elements is a noble gas?
a) Nitrogen
b) Argon
c) Oxygen
d) Fluorine
3. The heat energy required to raise the temperature of 1 gram of water by 1°C is called:
a) Specific heat
b) Latent heat
c) Enthalpy
d) Calorie
4. Which of the following elements is most likely to form a negative ion with a -1 charge?
a) Sodium
b) Chlorine
c) Calcium
d) Magnesium
5. What is the color of a flame produced when lithium salts are burned?
a) Green
b) Red
c) Blue
d) Yellow
6. What is the general formula for an alkene?
a) CnH2n
b) CnH2n+2
c) CnH2n-2
d) CnH2n+1
7. Which of the following is NOT a type of chemical bond?
a) Covalent bond
b) Ionic bond
c) Hydrogen bond
d) Magnetic bond
8. What is the molarity of a solution that contains 4 moles of NaOH dissolved in 2 liters of water?
a) 2 M
b) 4 M
c) 0.5 M
d) 1 M
9. What is the pH of a neutral solution at 25°C?
a) 7
b) 14
c) 0
d) 1
10. The most stable isotope of hydrogen is:
a) Deuterium
b) Tritium
c) Protium
d) Hydrogen-3
11. What is the main product of the reaction between sulfuric acid and sodium hydroxide?
a) Sodium sulfate
b) Sodium carbonate
c) Sodium chloride
d) Water
12. What is the name of the compound with the formula FeCl3?
a) Iron(III) chloride
b) Iron(II) chloride
c) Iron chloride
d) Ferric chloride
13. Which of the following substances is an example of a non-metallic element?
a) Iron
b) Zinc
c) Sulfur
d) Copper
14. What is the primary use of ammonia in industry?
a) Manufacturing of glass
b) Production of fertilizers
c) Producing hydrogen
d) Refining metals
15. Which of the following gases is most commonly used in chemical laboratories for generating an inert atmosphere?
a) Oxygen
b) Nitrogen
c) Carbon dioxide
d) Helium
16. What is the chemical formula of sulfur dioxide?
a) SO
b) SO2
c) SO3
d) S2O3
17. Which of the following compounds is an example of a strong base?
a) Ammonium hydroxide
b) Sodium hydroxide
c) Potassium chloride
d) Calcium carbonate
18. Which of the following is a property of metals?
a) Brittle
b) Good conductors of heat and electricity
c) Poor conductors of heat
d) Low melting points
19. The process of removing electrons from an atom is called:
a) Reduction
b) Oxidation
c) Ionization
d) Sublimation
20. What is the electron configuration of nitrogen (N)?
a) 1s² 2s² 2p³
b) 1s² 2s² 2p⁴
c) 1s² 2s² 2p²
d) 1s² 2s² 2p⁵
21. Which of the following is a property of ionic compounds?
a) They are non-conductors of electricity in the solid state
b) They are poor conductors of electricity when dissolved in water
c) They have high melting points
d) They are always soluble in water
22. Which of the following gases is produced when an acid reacts with a metal?
a) Oxygen
b) Nitrogen
c) Hydrogen
d) Carbon dioxide
23. Which of the following has the smallest atomic radius?
a) Na
b) Mg
c) Cl
d) O
24. Which of the following is the chemical formula for calcium nitrate?
a) CaNO3
b) Ca(N03)2
c) Ca(NO3)3
d) Ca2N3
25. The bond formed between two nonmetals is generally:
a) Ionic
b) Covalent
c) Metallic
d) Polar covalent
26. What is the volume of 1 mole of an ideal gas at standard temperature and pressure (STP)?
a) 22.4 L
b) 11.2 L
c) 1 L
d) 1 m³
27. Which of the following is an example of a physical change?
a) Burning wood
b) Rusting of iron
c) Melting ice
d) Cooking food
28. Which of the following is the main component of Earth's atmosphere?
a) Oxygen
b) Nitrogen
c) Carbon dioxide
d) Argon
29. The reaction between sodium and water produces:
a) Hydrogen gas and sodium hydroxide
b) Hydrogen gas and sodium chloride
c) Sodium oxide and water
d) Sodium hydrogen sulfate
30. Which of the following is true about acids?
a) They turn blue litmus paper red
b) They turn red litmus paper blue
c) They feel slippery
d) They have a bitter taste
31. The ionization energy of an element is the energy required to:
a) Remove an electron from a neutral atom in the gas phase
b) Add an electron to a neutral atom in the gas phase
c) Break a chemical bond
d) Remove a proton from a nucleus
32. Which of the following elements is most likely to have an oxidation state of +2?
a) Oxygen
b) Magnesium
c) Chlorine
d) Nitrogen
33. What is the name of the compound Na2SO4?
a) Sodium sulfate
b) Sodium sulfide
c) Sodium sulfite
d) Sodium sulfate
34. Which of the following is a source of natural carbon dioxide?
a) Burning of fossil fuels
b) Respiration of animals
c) Photosynthesis
d) All of the above
35. Which of the following is a property of acids?
a) They have a bitter taste
b) They turn blue litmus paper red
c) They are slippery
d) They react with metals to form hydroxides
36. Which of the following is NOT an allotrope of carbon?
a) Graphite
b) Diamond
c) Fullerenes
d) Nitrogen
37. The molecular formula of benzene is:
a) C6H5
b) C6H6
c) C5H5
d) C5H6
38. Which of the following compounds is a Lewis acid?
a) NH3
b) CO2
c) BF3
d) H2O
39. Which of the following is an example of a chemical property?
a) Color
b) Boiling point
c) Reactivity with oxygen
d) Hardness
40. The formula for the sulfate ion is:
a) SO2²⁻
b) SO4²⁻
c) SO3²⁻
d) SO4⁻
41. Which of the following substances is used in the preparation of soda-lime?
a) Calcium oxide
b) Sodium hydroxide
c) Potassium hydroxide
d) Calcium hydroxide
42. Which of the following compounds is known as "caustic soda"?
a) NaOH
b) NaCl
c) Na2SO4
d) Na2CO3
43. Which of the following reactions is an example of a redox reaction?
a) Na + Cl2 → NaCl
b) HCl + NaOH → NaCl + H2O
c) H2 + O2 → H2O
d) CaO + H2O → Ca(OH)2
- Which of the following elements is a transition metal?
a) Calcium
b) Iron
c) Helium
d) Nitrogen
45. Which of the following molecules has a bent molecular geometry?
a) CO2
b) H2O
c) CH4
d) NH3
46. Which of the following acids is present in the stomach?
a) Hydrochloric acid (HCl)
b) Sulfuric acid (H2SO4)
c) Nitric acid (HNO3)
d) Phosphoric acid (H3PO4)
47. The rate of a chemical reaction is affected by:
a) Temperature
b) Concentration of reactants
c) Surface area of reactants
d) All of the above
48. Which of the following is the least reactive element?
a) Sodium
b) Helium
c) Potassium
d) Chlorine
49. The formation of a solid from a solution is called:
a) Precipitation
b) Dissolution
c) Evaporation
d) Condensation
50. The process of converting a liquid to a gas is called:
a) Freezing
b) Evaporation
c) Condensation
d) Sublimation
Answer Key:
- b) 17
- b) Argon
- a) Specific heat
- b) Chlorine
- b) Red
- a) CnH2n
- d) Magnetic bond
- a) 2 M
- a) 7
- c) Protium
- a) Sodium sulfate
- a) Iron(III) chloride
- c) Sulfur
- b) Production of fertilizers
- b) Nitrogen
- b) SO2
- b) Sodium hydroxide
- b) Good conductors of heat and electricity
- b) Oxidation
- a) 1s² 2s² 2p³
- c) They have high melting points
- c) Hydrogen
- c) Cl
- b) Ca(N03)2
- b) Covalent
- a) 22.4 L
- c) Melting ice
- b) Nitrogen
- a) Hydrogen gas and sodium hydroxide
- a) They turn blue litmus paper red
- a) Remove an electron from a neutral atom in the gas phase
- b) Magnesium
- a) Sodium sulfate
- d) All of the above
- b) They turn blue litmus paper red
- d) Nitrogen
- b) C6H6
- c) BF3
- c) Reactivity with oxygen
- b) SO4²⁻
- a) Calcium oxide
- a) NaOH
- a) Na + Cl2 → NaCl
- b) Iron
- b) H2O
- a) Hydrochloric acid (HCl)
- d) All of the above
- b) Helium
- a) Precipitation
- b) Evaporation
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